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Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints
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From: H. Peter Anvin
Subject:
Re: [PATCH] tracing: Cleanup the convoluted softirq tracepoints
Date: Monday, October 25, 2010 - 2:54 pm
On 10/20/2010 08:27 AM, Jason Baron wrote:
quoted text
> > sure. The idea of the 'jmp 0' was simply to be an lcd for x86, if > there's a better lcd for x86, I'll update it. But note, that since the > 'jmp 0' is patched to a better nop at boot, we wouldn't see much gain. > And in the boot path we are using 'text_poke_early()', so avoiding that > isn't going to improve things much. >
It's still a completely unnecessary waste of startup time some potentially significant fraction of the time. Startup time matters, especially as the number of tracepoints grow. -hpa --
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Messages in current thread:
[PATCH v4 0/5] netdev: show a process of packets
, Koki Sanagi
, (Mon Aug 23, 2:41 am)
[PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Koki Sanagi
, (Mon Aug 23, 2:42 am)
[PATCH v4 2/5] napi: convert trace_napi_poll to TRACE_EVENT
, Koki Sanagi
, (Mon Aug 23, 2:43 am)
[PATCH v4 4/5] skb: add tracepoints to freeing skb
, Koki Sanagi
, (Mon Aug 23, 2:46 am)
[PATCH v4 5/5] perf:add a script shows a process of packet
, Koki Sanagi
, (Mon Aug 23, 2:47 am)
Re: [PATCH v4 2/5] napi: convert trace_napi_poll to TRACE_ ...
, David Miller
, (Mon Aug 23, 8:52 pm)
Re: [PATCH v4 3/5] netdev: add tracepoints to netdev layer
, David Miller
, (Mon Aug 23, 8:53 pm)
Re: [PATCH v4 4/5] skb: add tracepoints to freeing skb
, David Miller
, (Mon Aug 23, 8:53 pm)
Re: [PATCH v4 5/5] perf:add a script shows a process of packet
, David Miller
, (Mon Aug 23, 8:53 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, Steven Rostedt
, (Mon Aug 30, 4:50 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, Koki Sanagi
, (Thu Sep 2, 7:10 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, David Miller
, (Thu Sep 2, 7:17 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, Koki Sanagi
, (Thu Sep 2, 7:55 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, Frederic Weisbecker
, (Thu Sep 2, 9:46 pm)
Re: [PATCH v4 0/5] netdev: show a process of packets
, Koki Sanagi
, (Thu Sep 2, 10:12 pm)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Frederic Weisbecker
, (Fri Sep 3, 8:29 am)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Steven Rostedt
, (Fri Sep 3, 8:39 am)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Frederic Weisbecker
, (Fri Sep 3, 8:42 am)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Steven Rostedt
, (Fri Sep 3, 8:43 am)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Frederic Weisbecker
, (Fri Sep 3, 8:50 am)
Re: [PATCH v4 1/5] irq: add tracepoint to softirq_raise
, Koki Sanagi
, (Sun Sep 5, 6:46 pm)
Re: [PATCH v4 5/5] perf:add a script shows a process of packet
, Frederic Weisbecker
, (Tue Sep 7, 9:57 am)
[tip:perf/core] irq: Add tracepoint to softirq_raise
, tip-bot for Lai Jian ...
, (Wed Sep 8, 1:33 am)
[tip:perf/core] napi: Convert trace_napi_poll to TRACE_EVENT
, tip-bot for Neil Horman
, (Wed Sep 8, 1:34 am)
[tip:perf/core] skb: Add tracepoints to freeing skb
, tip-bot for Koki Sanagi
, (Wed Sep 8, 1:35 am)
[tip:perf/core] perf: Add a script to show packets processing
, tip-bot for Koki Sanagi
, (Wed Sep 8, 1:35 am)
[sparc build bug] Re: [tip:perf/core] irq: Add tracepoint ...
, Ingo Molnar
, (Wed Sep 8, 4:25 am)
[PATCH] irq: Fix circular headers dependency
, Frederic Weisbecker
, (Wed Sep 8, 5:26 am)
[tip:perf/core] irq: Fix circular headers dependency
, tip-bot for Frederic ...
, (Thu Sep 9, 12:54 pm)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Peter Zijlstra
, (Mon Oct 18, 2:44 am)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Peter Zijlstra
, (Mon Oct 18, 3:11 am)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Heiko Carstens
, (Mon Oct 18, 3:26 am)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Peter Zijlstra
, (Mon Oct 18, 3:48 am)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Koki Sanagi
, (Tue Oct 19, 3:58 am)
Re: [sparc build bug] Re: [tip:perf/core] irq: Add tracepo ...
, Peter Zijlstra
, (Tue Oct 19, 4:25 am)
[PATCH] tracing: Cleanup the convoluted softirq tracepoints
, Thomas Gleixner
, (Tue Oct 19, 6:00 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Peter Zijlstra
, (Tue Oct 19, 6:08 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Tue Oct 19, 6:22 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 6:41 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 6:54 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Tue Oct 19, 7:00 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 7:07 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Tue Oct 19, 7:28 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 7:46 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 12:49 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 1:55 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 2:07 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, David Daney
, (Tue Oct 19, 2:16 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 2:23 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Tue Oct 19, 2:28 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Tue Oct 19, 2:32 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, David Daney
, (Tue Oct 19, 2:38 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 2:45 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 2:47 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 2:48 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 2:55 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 3:04 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 3:14 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Tue Oct 19, 3:17 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 3:23 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 3:26 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Peter Zijlstra
, (Tue Oct 19, 3:27 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 3:33 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Tue Oct 19, 3:38 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Tue Oct 19, 3:41 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 3:44 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 3:49 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 3:56 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 3:57 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 4:05 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 4:09 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Tue Oct 19, 4:39 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 4:45 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Tue Oct 19, 5:43 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Tue Oct 19, 6:36 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Tue Oct 19, 6:52 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Jason Baron
, (Wed Oct 20, 8:27 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Wed Oct 20, 8:41 am)
[tip:perf/core] tracing: Cleanup the convoluted softirq tr ...
, tip-bot for Thomas G ...
, (Thu Oct 21, 7:52 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Thu Oct 21, 9:18 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Thu Oct 21, 10:05 am)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Thomas Gleixner
, (Thu Oct 21, 12:56 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Mon Oct 25, 2:54 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Mon Oct 25, 3:01 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Mon Oct 25, 3:12 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Mon Oct 25, 3:19 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Mon Oct 25, 3:31 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, H. Peter Anvin
, (Mon Oct 25, 3:32 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Mon Oct 25, 3:55 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Steven Rostedt
, (Mon Oct 25, 5:39 pm)
Re: [PATCH] tracing: Cleanup the convoluted softirq tracep ...
, Mathieu Desnoyers
, (Mon Oct 25, 6:14 pm)
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